Idle power control in multi-display systems
US8949554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2011 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Apr 30, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for reducing power consumption of a video subsystem. A computer system includes multiple display devices supported by a graphics processor. A memory for storing video data for the multiple display devices utilizes multiple channels for higher bandwidth. A systems controller within the graphics processor determines a retraining condition, such as an idle power state, is satisfied for one or more channels of the multiple memory channels. The graphics processor divides each respective screen for the multiple display devices into multiple horizontal bars. For each one of the multiple horizontal bars, the corresponding data may be rearranged from being distributed across the multiple channels to being stored in a single one of the multiple channels. The systems controller determines a given channel is an upcoming free channel. This free channel is retrained while it is free. Retraining may include at least reducing its memory clock (MCLK) frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.